UIAlertView在UIAlertView委托中单击事件

Question

我是iPhone开发人员的新手，

我想一个接一个地实现两个警报视图，比如当用户按下删除按钮时，第一个警报视图会问Are you sure want to Delete ?有两个按钮yes和no。

现在，如果用户按下yes，那么第二个警告视图将伴随消息Deleted Successfully ! --这个警告视图只包含OK按钮，现在单击这个OK按钮，我想调用一个方法。

如果用户按下No，那么什么都不应该发生，警报应该被忽略。

这是我的代码片段，

-(void)DeletebtnCliked:(id)sender
{   
    UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:@"Are you sure want to delete ?"
                                                        message:nil delegate:self 
                                              cancelButtonTitle:nil
                                              otherButtonTitles:@"Yes",@"No",nil];
    [alertView show];
    [alertView release];   
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{ 
    if (buttonIndex == 0)
    {            
         UIAlertView* alertew = [[UIAlertView alloc] initWithTitle:@"Deleted Successfully !"
                                                           message:nil delegate:self 
                                                 cancelButtonTitle:@"OK"
                                                 otherButtonTitles:nil];
        [alertew show];
        [alertew release];

        if (buttonIndex == 0)
        {
            [self MethodCall];
        }
    }
    else if (buttonIndex == 1)
    {
        [alertView dismissWithClickedButtonIndex:1 animated:TRUE];
    } 
}

写完这段代码后，我就在无限循环中了。

任何帮助都将不胜感激.

Answer 1

alertView.tag = 1;
alertew.tag = 2;

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (alertView.tag == 2)
    {
        //Do something
    }
    else
    {
        //Do something else
    }
}

Answer 2

将第二个警报视图的委托设置为零：

UIAlertView* alertew = [[UIAlertView alloc] initWithTitle:@"Deleted Successfully !"
                                                            message:nil delegate:nil 
                                                  cancelButtonTitle:@"OK" otherButtonTitles:nil];

Answer 3

或者使用标记来处理类似于下面这样的情况，或者只是为内部的alertView设置Delegate，这是在委托方法中的，这样它就不会调用。

-(void)DeletebtnCliked:(id)sender
{   
    UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:@"Are you sure want to delete ?"
                                                    message:nil delegate:self 
                                          cancelButtonTitle:nil
                                          otherButtonTitles:@"Yes",@"No",nil];
alertView.tag = 1;
[alertView show];
[alertView release];   
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{ 
if (buttonIndex == 0 && alertView.tag == 1)
{            
     UIAlertView* innerAlert = [[UIAlertView alloc] initWithTitle:@"Deleted Successfully !"
                                                       message:nil delegate:nil 
                                             cancelButtonTitle:@"OK"
                                             otherButtonTitles:nil];
    innerAlert.tag = 2;
    [innerAlert show];
    [innerAlert release];

    if (buttonIndex == 0 && alertView.tag == 1)
    {
        [self MethodCall];
    }
}
else if (buttonIndex == 1 && alertView.tag == 1)
{
    [alertView dismissWithClickedButtonIndex:1 animated:TRUE];
} 
}